Re: [lwip-users] LWIP Process Model confusion:

[Simon Goldschmidt]

> > can i exec a process instead of a thread? and how will syncronization
> > work b/w processes, if they aren't threads.
> 
> Yes, you could execute a process instead of a thread.  However you would
> then, as you realise, have to re-write the other parts of sys_arch.c to
> use inter-process communication, rather than the simple inter-thread
> communication that they do now.  The rest of lwIP has been written not
> to know or care how communication is done between the threads/processes,
> so you can use whatever method you like for synchronisation.

Kieran, do you know that (i.e. tried it) or just saying this from 
reading/knowing the code? I would expect there are some (maybe hidden) problems 
where pointers are passed from thread to thread? The first thing that comes to 
my mind is tcp_callback or maybe the input functions. The problem here is that 
pointers are passed to sys_arch.c to be sent through an mbox without knowing 
the type of data behind the pointer. I don't think this would work as it is in 
a multi-process environment...

Simon
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